Third-degree Black Belt Sudoku
Watch out - these sudoku might crush even the most stalwart ofsolvers! With a separate sudoku book for every level, all puzzlelovers can play this wildly popular, incredibly addictive game!From prolific and popular puzzle and sudoku author ? Frank Longo,it takes a page from karate - another Japanese art ? as each titleis graded by colour: White Belt for easy, Green Belt for mediumlevel, Brown Belt for hard and Black Belt for the super-toughsolvers. And because each book has an amazing 300 puzzles, the funcan go on for hours?ISBN13: 9781402746499
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